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A point charge causes an electric flux of −1.0×103Nm2/C to pass through a spherical Gaussian surface of 10.0 cm radius centred on the charge. (a) If the radius of the Gaussian surface were doubled, how much flux would pass through the surface? (b) What is the value of the point charge? 
  • a)
     
    103Nm2/C,−7.8nC
  • b)
     
    B 103Nm2/C,−8.8nC
  • c)
     
    −103Nm2/C,−8.8nC
  • d)
     
    −103Nm2/C,−6.8nC
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
A point charge causes an electric flux of−1.0×103Nm2/Cto pa...
A. Doubling the radius of Gaussian surface will not affect the electric flux since the charge enclosed is the same in both cases. Thus, the flux will remain the same i.e., –1.0 x 10^3 Nm^2/C

(b) Using gauss theorem,

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A point charge causes an electric flux of−1.0×103Nm2/Cto pa...
$\Phi = \frac{Q}{\epsilon_0}$, where Q is the magnitude of the point charge and $\epsilon_0$ is the electric constant (also known as the permittivity of free space). The electric flux is a measure of the electric field passing through a surface, and it is given in units of volts times meters (V.m) or newton times meters squared per coulomb (N.m$^2$/C).
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A point charge causes an electric flux of−1.0×103Nm2/Cto pass through a spherical Gaussian surface of 10.0 cm radius centred on the charge. (a) If the radius of the Gaussian surface were doubled, how much flux would pass through the surface? (b) What is the value of the point charge?a)103Nm2/C,−7.8nCb)B103Nm2/C,−8.8nCc)−103Nm2/C,−8.8nCd)−103Nm2/C,−6.8nCCorrect answer is option 'C'. Can you explain this answer? for Class 12 2026 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A point charge causes an electric flux of−1.0×103Nm2/Cto pass through a spherical Gaussian surface of 10.0 cm radius centred on the charge. (a) If the radius of the Gaussian surface were doubled, how much flux would pass through the surface? (b) What is the value of the point charge?a)103Nm2/C,−7.8nCb)B103Nm2/C,−8.8nCc)−103Nm2/C,−8.8nCd)−103Nm2/C,−6.8nCCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A point charge causes an electric flux of−1.0×103Nm2/Cto pass through a spherical Gaussian surface of 10.0 cm radius centred on the charge. (a) If the radius of the Gaussian surface were doubled, how much flux would pass through the surface? (b) What is the value of the point charge?a)103Nm2/C,−7.8nCb)B103Nm2/C,−8.8nCc)−103Nm2/C,−8.8nCd)−103Nm2/C,−6.8nCCorrect answer is option 'C'. Can you explain this answer?.
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